U.S. patent number 6,036,354 [Application Number 09/104,503] was granted by the patent office on 2000-03-14 for method and apparatus for product enrichment.
Invention is credited to Mark S. Bandy.
United States Patent |
6,036,354 |
Bandy |
March 14, 2000 |
Method and apparatus for product enrichment
Abstract
A method for enriching a processed agricultural commodity
includes the initial step of preparing a liquid enrichment
solution. The solution is continuously mixed in a measured flow of
supply water and thence the enriched supply water is mixed with a
measured amount of flour to produce a dough which is uniformly
enriched. The enrichment injection system of the present invention
includes a tank for the preparation of the enrichment solution with
a delivery pipe extending from a drain therein to delivery the
solution to a fluid mixer. A water supply line provides water to
the fluid mixer, and flow meters are interposed on both the
delivery pipe and the water supply line. A flow control valve is
interposed in the delivery pipe and connected to an electronic
controller to selectively adjust the flow of enrichment solution to
the fluid mixer to achieve the desired mixture of water and
enrichment solution.
Inventors: |
Bandy; Mark S. (Fargo, ND) |
Family
ID: |
22300844 |
Appl.
No.: |
09/104,503 |
Filed: |
June 25, 1998 |
Current U.S.
Class: |
366/76.6;
366/152.1; 366/160.1 |
Current CPC
Class: |
B01F
15/00123 (20130101); B01F 15/0429 (20130101) |
Current International
Class: |
B01F
15/04 (20060101); B01F 15/00 (20060101); B01F
015/02 (); A21C 001/00 () |
Field of
Search: |
;366/76.1,76.2,76.3,76.6,76.93,77,151.1,152.1,155.1,154.1,160.1,167.1,174.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Soohoo; Tony G.
Attorney, Agent or Firm: Zarley, McKee, Thomte, Voorhees
& Sease Thomte; Dennis L.
Claims
I claim:
1. An enrichment injection system, comprising:
a first tank for preparing an enrichment solution;
a delivery pipe extending from a drain in the first tank for
delivering solution to a fluid
a fluid mixer connected to an outlet end of the delivery pipe and
an outlet end of a water supply line, for mixing a measured amount
of water from the water supply line with solution from the delivery
pipe;
an electronic delivery pipe fluid flow meter interposed in the
delivery pipe to measure the flow of enrichment solution
therethrough;
an electronic control valve interposed in the delivery pipe between
the delivery pipe fluid flow meter and the fluid mixer for
selectively adjusting the flow of enrichment solution through the
delivery pipe;
a conduit extending from the fluid mixer to a dough mixer; and
a flour supply apparatus connected to the dough mixer for supplying
a measured amount of flour to the dough mixer;
said dough mixer operable to mix measured amounts of flour from the
flour supply apparatus and measured amounts of water containing
enrichment solution from the conduit, to create an enriched dough
product.
2. The system of claim 1, further comprising:
a first electronic fluid flow meter interposed in the water supply
line to measure the flow of water therethrough; and
an electronic controller electrically connected to the first and
second flow meters, the control valve, and the flour supply
apparatus, operable to detect the flow of water and enrichment
solution and control the flow of the enrichment solution to produce
a mixed water supply with enrichment solution mixed therein in a
predetermined concentration, and to control the amount of flour
added to the dough mixer with the enriched water supply to produce
an enriched dough product having a predetermined concentration of
enriched solution uniformly therethrough.
3. The system of claim 2, wherein the fluid mixer is an in line
static mixer.
4. The system of claim 2, further comprising a potable water supply
and a pipe extending therefrom to the first tank to supply water
thereto, and further comprising an electrically operated control
valve interposed in the water supply pipe and electrically
connected to the controller for selective dispensing of potable
water into the first tank.
5. The system of claim 4, further comprising a second tank for
holding a prepared enrichment solution, the second tank having a
drain in the lower end thereof and drain pipe extending from the
second tank drain to an electronically actuated valve interposed in
the delivery pipe, said first tank including a drain and drain pipe
extending therefrom to the electronically actuated valve in the
delivery pipe;
said valve in the delivery pipe electrically connected to the
controller for selective operation of the valve to direct fluid
from either the first tank or the second tank to the delivery pipe
and fluid mixer.
6. The system of claim 2, further comprising a second tank for
holding a prepared enrichment solution, the second tank having a
drain in the lower end thereof and drain pipe extending from the
second tank drain to an electronically actuated valve interposed in
the delivery pipe, said first tank including a drain and drain pipe
extending therefrom to the electronically actuated valve in the
delivery pipe;
said valve in the delivery pipe electrically connected to the
controller for selective operation of the valve to direct fluid
from either the first tank or the second tank to the delivery pipe
and fluid mixer.
7. An enrichment injection system, comprising:
a tank for preparing an enrichment solution;
a delivery pipe extending from the tank to a dough mixer;
a flow meter and flow control valve interposed in the delivery pipe
and electrically connected to an electronic controller;
a flour supply apparatus connected to the dough mixer and having a
feeder valve and moisture content sensor, the valve and sensor
electrically connected to the electronic controller;
a water supply pipe extending from a water supply to the dough
mixer;
a flow meter and flow control valve interposed in the water supply
pipe and electrically connected to the electronic controller;
said electronic controller including a processor for processing
data from the flour supply apparatus, flow meters and flow control
valves, and controlling the feeder valve and flow control valves to
supply predetermined amounts of flour, water and enrichment
solution to the dough mixer; and
said dough mixer operable to mix the flour, water and enrichment
solution to create a uniformly enriched dough product.
8. An enrichment injection system, comprising:
a first tank for preparing an enrichment solution;
a delivery pipe extending from a drain in the first tank for
delivering solution to a mixer;
a fluid mixer connected to an outlet end of the delivery pipe and
an outlet end of a water supply line, for mixing water from the
water supply line with solution from the delivery pipe;
a conduit extending from the fluid mixer to a dough mixer;
a flour supply apparatus connected to the dough mixer, for
supplying a measured amount of flour to the dough mixer, said dough
mixer operable to mix measured amounts of flour from the flour
supply apparatus and measured amounts of water containing
enrichment solution from the conduit;
a first electronic fluid flow meter interposed in the water supply
line to measure the flow of water therethrough;
a second electronic fluid flow meter interposed in the delivery
pipe to measure the flow of enrichment solution therethrough;
an electronic control valve interposed in the delivery pipe between
the second flow meter and the fluid mixer for selectively adjusting
the flow of enrichment solution through the delivery pipe;
an electronic controller electrically connected to the first and
second flow meters, the control valve, and the flour supply
apparatus, operable to detect the flow of water and enrichment
solution and control the flow of the enrichment solution to produce
a mixed water supply with enrichment solution mixed therein in a
predetermined concentration, and to control the amount of flour
added to the dough mixer with the enriched water supply to produce
an enriched dough product having a predetermined concentration of
enriched solution uniformly therethrough;
said fluid mixer being an in-line static mixer; and
said first tank further including an electrically operated agitator
for mixing the contents of the first tank, the agitator
electrically connected to the controller for selective operation
thereof.
9. The system of claim 8, further comprising a potable water supply
and a pipe extending therefrom to the first tank to supply water
thereto, and further comprising an electrically operated control
valve interposed in the water supply pipe and electrically
connected to the controller for selective dispensing of potable
water into the first tank.
10. The system of claim 9, further comprising a second tank for
holding a prepared enrichment solution, the second tank having a
drain in the lower end thereof and drain pipe extending from the
second tank drain to an electronically actuated valve interposed in
the delivery pipe, said first tank including a drain and drain pipe
extending therefrom to the electronically actuated valve in the
delivery pipe;
said valve in the delivery pipe electrically connected to the
controller for selective operation of the valve to direct fluid
from either the first tank or the second tank to the delivery pipe
and fluid mixer.
11. The system of claim 10, further comprising a return tube
extending from this delivery pipe valve to an electronically
actuated return tube valve operable to direct fluid to either the
first tank or second tank;
said return tube valve electrically connected to the controller for
selective operation thereof; and
a first pump interposed in the drain pipe between the first tank
and delivery pipe valve to pump selectively pump fluid to the
delivery pipe valve;
a second pump interposed in the second tank drain pipe operable to
pump fluid towards the delivery pipe valve;
said first and second pumps electrically connected to the
controller for selective operation thereof.
12. The system of claim 11, further comprising a system drain
fluidly connected to first and second electrically actuated valves,
the first valve interposed in the fluid line between the return
tube valve and the first tank, and the second operable valve
interposed in the fluid line between the return tube valve and the
second tank, a first and second operable valves connected to the
controller for selective operation to selectively direct fluid to
the system drain or to the associated tank.
13. The system of claim 12, further comprising a third tank having
a cleaning agent therein connected via a tube to an electrically
actuated valve, the valve operable to direct fluid to either the
first or second tanks, said third tank valve electrically connected
to the controller for selective operation thereof; and
a pump interposed in the tube between the third tank and its
associated valve for pumping fluid to either the first or second
tank, said pump electrically connected to the controller for
selective operation thereof.
14. An enrichment injection system, comprising:
a first tank for preparing an enrichment solution;
a delivery pipe extending from a drain in the first tank for
delivering solution to a mixer;
a fluid mixer connected to an outlet end of the delivery pipe and
an outlet end of a water supply line, for mixing water from the
water supply line with solution from the delivery pipe;
a conduit extending from the fluid mixer to a dough mixer;
a flour supply apparatus connected to the dough mixer, for
supplying a measured amount of flour to the dough mixer, said dough
mixer operable to mix measured amounts of flour from the flour
supply apparatus and measured amounts of water containing
enrichment solution from the conduit;
a first electronic fluid flow meter interposed in the water supply
line to measure the flow of water therethrough;
a second electronic fluid flow meter interposed in the delivery
pipe to measure the flow of enrichment solution therethrough;
an electronic control valve interposed in the delivery pipe between
the second flow meter and the fluid mixer for selectively adjusting
the flow of enrichment solution throughout the delivery pipe;
and
an electronic controller electrically connected to the first and
second flow meters, the control valve, and the flour supply
apparatus, operable to detect the flow of water and enrichment
solution and control the flow of the enrichment solution to produce
a mixed water supply with enrichment solution mixed therein in a
predetermined concentration, and to control the amount of flour
added to the dough mixer with the enriched water supply to produce
an enriched dough product having a predetermined concentration of
enriched solution uniformly therethrough;
a potable water supply and a pipe extending therefrom to the first
tank to supply water thereto;
an electrically operated control valve interposed in the water
supply pipe and electrically connected to the controller for
selective dispensing of potable water into the first tank;
a second tank for holding a prepared enrichment solution, the
second tank having a drain in the lower end thereof and drain pipe
extending from the second tank drain to an electronically actuated
valve interposed in the delivery pipe, said first tank including a
drain and drain pipe extending therefrom to the electronically
actuated valve in the delivery pipe;
said valve in the delivery pipe electrically connected to the
controller for selective operation of the valve to direct fluid
from either the first tank or the second tank to the delivery pipe
and fluid mixer;
a return tube extending from the delivery pipe valve to an
electronically actuated return tube valve operable to direct fluid
to either the first tank or second tank;
said return tube valve electrically connected to the controller for
selective operation thereof;
a first pump interposed in the drain pipe between the first tank
and delivery pipe valve to pump selectively pump fluid to the
delivery pipe valve; and
a second pump interposed in the second tank drain pipe operable to
pump fluid toward the delivery pipe valve;
said first and second pumps electrically connected to the
controller for selective operation thereof.
15. The system of claim 14, further comprising a system drain
fluidly connected to first and second electrically actuated valves,
the first valve interposed in the fluid line between the return
tube valve and the first tank, and the second operable vale
interposed in the fluid line between the return tube valve and the
second tank, a first and second operable valves connected to the
controller for selective operation to selectively direct fluid to
the system drain or to the associated tank.
16. The system of claim 15, further comprising a third tank having
a cleaning agent therein connected via a tube to an electrically
actuated valve, the valve operable to direct fluid to either the
first or second tanks, said third tank valve electrically connected
to the controller for selective operation thereof; and
a pump interposed in the tube between the third tank and its
associated valve for pumping fluid to either the first or second
tank, said pump electrically connected to the controller for
selective operation thereof.
17. An enrichment injection system, comprising:
a first tank for preparing an enrichment solution;
a delivery pipe extending from a drain in the first tank for
delivering solution to a mixer;
a fluid mixer connected to an outlet end of the delivery pipe and
an outlet end of a water supply line, for mixing water from the
water supply line with solution from the delivery pipe;
a conduit extending from the fluid mixer to a dough mixer;
a flour supply apparatus connected to the dough mixer, for
supplying a measured amount of flour to the dough mixer, said dough
mixer operable to mix measured amounts of flour from the flour
supply apparatus and measured amounts of water containing
enrichment solutions from the conduit;
a first electronic fluid flow meter interposed in the water supply
line to measure the flow of water therethrough;
a second electronic fluid flow meter interposed in the delivery
pipe to measure the flow of enrichment solution therethrough;
an electronic control valve interposed in the delivery pipe between
the second flow meter and the fluid mixer for selectively adjusting
the flow of enrichment solution through the delivery pipe; and
an electronic controller electrically connected to the first and
second flow meters, the control valve, and the flour supply
apparatus, operable to detect the flow of water and enrichment
solution and control the flow of the enrichment solution to produce
a mixed water supply with enrichment solution mixed therein in a
predetermined concentration, and to control the amount of flour
added to the dough mixer with the enriched water supply to produce
an enriched dough product having a predetermined concentration of
enriched solution uniformly therethrough;
a second tank for holding a prepared enrichment solution, the
second tank having a drain in the lower end thereof and drain pipe
extending from the second tank drain to an electronically actuated
valve interposed in the delivery pipe, said first tank including a
drain and drain pipe extending therefrom to the electronically
actuated valve in the delivery pipe;
said valve in the delivery pipe electrically connected to the
controller for selective operation of the valve to direct fluid
from either the first tank or the second tank to the delivery pipe
and fluid mixer;
a return tube extending from the delivery pipe valve to an
electronically actuated return tube valve operable to direct fluid
to either the first tank or second tank;
said return tube valve electrically connected to the controller for
elective operation thereof;
a first pump interposed in the drain pipe between the first tank
and delivery pipe valve to selectively pump fluid to the delivery
pipe valve; and
a second pump interposed in the second tank drain pipe operable to
pump fluid towards the delivery pipe valve;
said first and second pumps electrically connected to the
controller for selective operation thereof.
18. The system of claim 17, further comprising a system drain
fluidly connected to first and second electrically actuated valves,
the first valve interposed in the fluid line between the return
tube valve and the first tank, and the second operable valve
interposed in the fluid line between the return tube valve and the
second tank, a first and second operable valves connected to the
controller for selective operation to selectively direct fluid to
the system drain or to the associated tank.
19. The system of claim 18, further comprising a third tank having
a cleaning agent therein connected via a tube to an electrically
actuated valve, the valve operable to direct fluid to either the
first or second tanks, said third tank valve electrically connected
to the controller for selective operation thereof; and
a pump interposed in the tube between the third tank and its
associated valve for pumping fluid to either the first or second
tank, said pump electrically connected to the controller for
selective operation thereof.
Description
TECHNICAL FIELD
The present invention relates generally to enrichment of processed
agricultural commodities, and more particularly to an improved
method and apparatus for product enrichment which provides uniform
dispersion of an enriched solution throughout a commodity.
BACKGROUND OF THE INVENTION
Enrichment is defined as the addition of essential vitamins and
minerals to processed agricultural commodities, such as flour, that
is intended for human consumption. The final concentration of the
vitamins and minerals in the food product is regulated and
monitored by the U.S. Food and Drug Administration (FDA). Failure
to meet the requirements established by the FDA can result in an
expensive recall of the final product after it has been placed on
the market.
Currently, product enrichment occurs at milling facilities by
augering powder form of the vitamins and minerals into a stream of
flour. This method of enrichment has a number of inherent problems,
resulting in a non-uniform disbursement of the vitamins and
minerals throughout the product. Because of the great variability
and inaccuracy of the prior art enrichment process, the enriched
food products are frequently outside FDA specifications, and
therefore subject to expensive product recall.
SUMMARY OF THE INVENTION
It is therefore a general object of the present invention to
provide an improved method and apparatus for enriching processed
agricultural commodities.
Another object is to provide an improved method and apparatus for
the enrichment of food products which uniformly and accurately
disperses vitamins and minerals throughout the food product.
Yet a further object of the present invention is to provide an
enrichment injection system which is simple to operate and
economical to manufacture.
These and other objects of the present invention will be apparent
to those skilled in the art.
The method for enriching a processed agricultural commodity of the
present invention includes the initial step of preparing a liquid
enrichment solution. The solution is continuously mixed in a
measured flow of supply water and thence the enriched supply water
is mixed with a measured amount of flour to produce a dough which
is uniformly enriched. The enrichment injection system of the
present invention includes a tank for the preparation of the
enrichment solution with a delivery pipe extending from a drain
therein to deliver the solution to a fluid mixer. A water supply
line provides water to the fluid mixer, and flow meters are
interposed on both the delivery pipe and the water supply line. A
flow control valve is interposed in the delivery pipe and connected
to an electronic controller to selectively adjust the flow of
enrichment solution to the fluid mixer to achieve the desired
mixture of water and enrichment solution.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic drawing of the solution processing apparatus
of the present invention;
FIG. 2 is a schematic drawing of the mixing apparatus of the
present invention;
FIG. 3 is a front elevational view of the processing apparatus;
FIG. 4 is a rearward elevational view of the processing apparatus;
and
FIG. 5 is a schematic drawing of a second embodiment of the mixing,
apparatus of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, in which similar or corresponding
parts are identified with the same reference numeral, and more
particularly to FIGS. 1 and 2, the enrichment injection system 10
of the present invention includes a solution processing apparatus
designated generally at 12, which produces enrichment solution for
a mixing apparatus designated generally at 14.
Referring specifically to FIG. 1, processing apparatus 12 includes
a pair of tanks 16 and 18, each having a lid 20 and 22
respectively, permitting access to the interior of the tanks. Tanks
16 and 18 each include an agitator 24 with a blade 26 mounted on a
shaft 28 which is powered by a motor 30, the blade disposed at the
lower end of tanks 16 and 18. Tanks 16 and 18 each include a drain
32 and 34 respectively, connected to drain pipes 36 and 38
respectively. Drain pipes 36 and 38 are each connected to a
centrifugal pump 40 and 42 respectively, the outlets of pumps 40
and 42 each connected via a conduit to a four-way valve 44 having
an electronic actuator 44a. Four-way valve 44 is operable to direct
fluid from pumps 40 and 42 in opposite directions, either to
delivery tube 46, or to return tube 48. Delivery tube 46 directs
fluid to the mixing apparatus 14, as described in more detail
hereinbelow. Return tube 48 returns fluid to its associated tanks
16 or 18, or to a system drain 50.
A hot potable water supply is designated generally at 52, and
delivers hot water through pipe 54 to a tee 56 whereupon the hot
water supply is divided and directed through supply tubes 58a and
58b to each of tanks 16 and 18 respectively. Similarly, cold
potable water supply 60 supplies cold water to a tee 62 and is
divided to pass through cold water supply tubes 64a and 64b to
tanks 16 and 18 respectively. Supply tubes 58a, 58b, 64a and 64b
each include a valve 66, 68, 70 and 72 respectively with electronic
actuators, to permit selective dispensing of hot and cold water to
tanks 16 and 18.
Return tube 48 extends from four-way valve 44 to a three-way valve
74 having an electronic actuator. Three-way valve 74 is operable to
direct fluid towards a second three-way valve 76 or a third
three-way valve 78 (each also electronically activated). Second
three-way valve 76 is operable to direct fluid either to tank 16,
or to system drain 50. Similarly, third three-way valve 78 is
operable to direct fluid to either tank 18 or system drain 50.
Pipe 80 and 82 extend from three-way valves 76 and 78,
respectively, to tanks 16 and 18 respectively, and have a spray
ball 84 and 86 respectively at the outlet end within tanks 16 and
18. Spray balls 84 and 86 disperse the fluid within tanks 16 and 18
to rinse and flush the interiors thereof.
A third tank 88 contains a liquid cleaning agent and has a tube 90
extending therefrom to a three-way valve 92 with electronic
actuator. Three-way valve 92 divides fluid from third tank 88 and
is operable to direct the fluid to a selected tank 16 or 18. A
peristaltic pump is interposed in tube 90 to pump cleaning agent
from tank 88 to the desired tank 16 or 18.
Three sensors 96, 98 and 100 are installed on tank 16, to determine
the level of fluid within the tank. Sensor 96 is located at the
upper end of tank 16, sensor 100 is located at the lower end of
tank 16, and sensor 98 is spaced slightly above lower sensor 100.
The purpose of the sensors will be described in more detail
hereinbelow. Upper sensor 102, intermediate sensor 104, and lower
sensor 106 are provided in a similar fashion on tank 18.
Referring now to FIG. 2, mixing apparatus 14 is shown in schematic
detail. Delivery tube 46, from processing apparatus 12, connects
with supply pipe 108, at a tee 110, the combination of fluids being
transported to a dough mixer 112 by conduit 114.
An electronic fluid flow meter 116 is interposed in supply pipe 108
upstream of tee 110, and a second electronic fluid flow meter 118
is interposed in delivery tube 46 upstream of tee 110. An
electronic flow control valve 120 is interposed between flow meter
118 and tee 110 to permit selective control of the flow of
enrichment solution from delivery pipe 46 to water from supply pipe
108. A check valve 122 prevents back flow of fluid into delivery
pipe 46. An in line static mixer 124 is provided to thoroughly mix
water from supply pipe 108 and enrichment solution from delivery
pipe 46 before the mixture travels to dough mixer 112.
A hopper 126 contains a supply of flour therein for the manufacture
of a processed agricultural commodity. An electronically controlled
rotary feeder 128 deposits measured amounts of flour into auger
130. Auger 130 conveys the measured flour at a constant rate to one
end of dough mixer 112 and deposits the flour into a mixing auger
132. Water with enriched solution uniformly mixed therein enters
the dough mixer 112 to combine with flour in the mixing auger 132.
Mixing auger 132 then conveys the dough out of the dough mixer
112.
All of the electronically actuated valves, sensors, agitators,
pumps, flow meters, feeders, and augers, are electronically
connected to an electrical controller 134, shown in FIG. 1.
Controller 134 includes an interface 136 permitting the programming
of the controller for the operation of all the components. FIG. 3
shows one arrangement of a processing apparatus 12 with the
controller 134 mounted on a base 138 with the interface 136 at
easily accessible height for an operator. As shown in FIGS. 3 and
4, tanks 16 and 18 are supported on base 138 and deliver enriched
solution via delivery tube 46 to the mixing apparatus (not
shown).
The enrichment solution injection system of the present invention
accurately delivers liquefied vitamins and minerals to flour
ensuring that the final product will meet FDA enrichment
specifications, and thereby eliminate product recall. Because the
method and apparatus are simple and economical to use, processors
may accurately enrich their products "in house" and avoid
inaccurate enrichment provided by supplier of dry components.
Referring once again to FIG. 1, the initial step for enriching a
processed agricultural commodity is the preparation of an
enrichment solution in tanks 16 and 18. Initially, tanks 16 and 18
are filled with a predetermined amount of premix water, supplied
from hot water supply 52 and cold water supply 60. The desired
vitamins and minerals are then added to tanks 16 and 18 through
access lids 20 and 22 so as to liquify the vitamins and minerals.
Agitators 30 are operated to mix the enrichment solution within
tanks 16 and 18, and maintain the vitamins and minerals suspended
in the solution. Once the enrichment solution is prepared for the
desired end product, solution is drained from tank 16 and pumped by
centrifugal pump 40 through four-way valve 44 to delivery tube
46.
Referring again to FIG. 2, the enrichment solution passes through
flow meter 118 and flow control valve 120 to mix with water from
supply pipe 108 in static mixer 124. Flow control valve 120
continuously measures the flow rates of water through flow meter
116, and enrichment solution through flow meter 118 to continuously
maintain the appropriate proportions of enrichment solution to
water. Once the enrichment solution and water has mixed in static
mixer 124, it continues through conduit 114 into dough mixer 112.
Simultaneously, flour from hopper 126 is measured by rotary feeder
128 and conveyed by auger 130 to dough mixer 112 where it is mixed
with the enriched water supply in mixing auger 132 to produce the
desired dough being uniformly enriched throughout.
While enrichment solution is being supplied by first tank 16, a
second batch of enrichment solution is prepared in tank 18, in the
same fashion as the enrichment solution in tank 16. Lower sensor
100 in tank 16 will detect when the first tank is depleted of the
enrichment solution, at which time controller 134 will operate
four-way valve 44 and pump 42 to initiate flow of enrichment
solution from tank 18. In this way, enrichment solution is
continuously supplied to delivery tube 46 without interruption.
As tank 18 supplies enrichment solution to delivery pipe 46,
controller 134 will automatically drain, flush, clean and sanitize
first tank 16 to allow preparation of a new batch of enrichment
solution. Initially, solution remaining within tank 16 is drained
via pump 40 through four-way valve 44 to return tube 48 and thence
to the system drain. Tank 16 is then flushed with water from hot
and/or cold water supplies 52 and 60, intermediate sensor 98 and
upper sensor 96 determining the level of rinse water within tank
16. The rinse water is then also drained through the system drain
50. Controller 134 then operates pump 94 to deliver cleaning agent
from third tank 88 into tank 16. Again, the cleaning agent is
drained from tank 16 and expelled from the processing apparatus
through system drain 50. Water is then again used to fill and flush
tank 16, and is preferably recirculated through pipe 80 and spray
ball 84 to thoroughly flush like entire tank 16. A new batch of
enrichment solution is then prepared within tank 16.
A second embodiment of the mixing apparatus is designated generally
at 14' in FIG. 5. In this second embodiment of the mixing apparatus
14', the delivery tube 46', carrying the enrichment solution, is
injected directly into dough mixer 112' separately from the water
supply pipe 108'. Delivery tube 46' still includes flow meter 118'
and flow control valve 120', to detect and control the flow of the
enrichment solution to the dough mixer 112'. Similarly, motor
supply pipe 108' includes flow meter 116' and a flow control valve
140' for detecting and controlling the flow of water supplied to
dough mixer 112'. Hopper 126' supplies flour through an
electronically controlled rotary feeder 128' to auger 130' which
deposits the flour into mixing auger 132' of dough mixer 112'. As
with the first embodiment of the invention, all of the
electronically actuated flow meters, flow control valves, feeders,
and augers, are electronically connected to the electrical
controller 134, shown in FIG. 1. Interface 136 permits the
programming of the controller for the operation of all of these
components.
In operation, the mixing apparatus 14' utilizes controller 134 to
determine the feed rate of dry product from hopper 126' through
feeder 128'. It processes this information with information as to
the moisture content of the dry product within hopper 126', so as
to adjust the flow of water from supply pipe 108', by adjusting
valve 140'. Thus, the moisture content of the dough being mixed
within dough mixer 112' is adjusted independently of the addition
of enrichment solution delivered by delivery tube 46'.
Whereas the invention has been shown and described in connection
with the preferred embodiment thereof, many modifications,
substitutions and additions may be made which are within the
intended broad scope of the appended claims.
* * * * *